ResearchResource

Online Venn diagrams for up to 4 lists, SVG/PNG export

Compare two texts side by side; accept or reject each change and export the merged result

网页高亮批注、便签与书签管理的 Chrome 扩展，数据默认只存本机

Google Scholar paper search

Biomedical literature database

Authoritative citation index

Elsevier abstract & citation database

Elsevier full-text journal library

Springer academic full-text library

Wiley academic database

Electrical & electronics engineering literature

Open preprint repository

Social science & humanities preprints

AI-powered academic search

World's largest open-access full-text aggregator

Finds legal free versions of paywalled papers

China's master academic literature library

Journals, theses & conference papers

Full-text Chinese journal database

Free philosophy & social science library

National science & technology library

Open-access Chinese papers & preprints

Full-text search across the world's books

Global library union catalogue

Union catalogue of Chinese libraries

National Library of China

Chinese book database with reviews

Public-domain classic e-books

Public-domain e-books, carefully typeset

Lendable online library

Wayback Machine & digital archive

Chinese classics database

Chinese web-novel platform

Book CIP cataloguing & publication metadata lookup

Full-text global patent search

EPO worldwide patent search

WIPO international patent database

Official Chinese patent search

Full Chinese patent specifications by publication number

Reverse image search

Search Official Account articles

Multilingual subtitle database

Chinese laws, regulations & judicial case search

One of the world's most visited encyclopedias

Quotations with sourced entries

Business & management knowledge base

Species accounts from a university zoology museum

Every Astronomy Picture of the Day, with commentary

Life-science preprints — stake your priority before submitting

Health-science preprints, same platform as bioRxiv

Elsevier's journal matcher: title & abstract in, candidates out

Paste an abstract, get suggested journals and similar papers

Check a journal's open-access and self-archiving policy

Pre-submission checklist to spot predatory journals and fake conferences

SCI journal quartiles and impact factors, in Chinese

Tracks retractions and research misconduct

Post-publication peer review — check for concerns before you cite

Open protocol platform with interactive, citable steps

Peer-reviewed life-science protocols

Video protocols, filmed step by step at the bench

Cold Spring Harbor's classic lab methods

Springer's protocol collection for molecular biology

Outsource experiments to certified labs

The persistent ID for researchers — used across submissions and grants

Personal profile that tracks citations and your h-index

Author records and citation tracking, linkable to ORCID

Log your peer-review and editorial work; feeds into your WoS profile

Look up a Scopus author profile and output by name

Add a plain-language summary to your paper and share it

Reference manager & researcher network

Subscribe to calls for papers by subject

Academic conference and deadline calendar, in Chinese

Search calls for papers by keyword — and a common submission system

Genes, sequences & biomedical records

Online sequence alignment

Vertebrate genome browser

Genome annotation browser

Protein-protein interaction networks

Gene expression & survival analysis

Functional enrichment analysis

Gene set enrichment analysis

Cancer genomic data explorer

Comprehensive gene annotation database

Online Venn diagrams for up to 4 lists, SVG/PNG export

Bioinformatics Q&A community

Authoritative protein sequence & annotation database

Protein 3D structure database

EBI proteomics data repository

European Bioinformatics Institute portal

Human protein expression & localization maps

Standard functional annotation of genes

Pathway & genome knowledge base

Curated pathway knowledgebase

Gene-list enrichment & analysis platform

Annotated protein-interaction knowledgebase

Desmos-style online grapher: type expressions, drag sliders, explore polar plots and inequality regions — all in your browser

Computational knowledge engine

Dynamic mathematics lab

Data science competitions & datasets

Dataset search for research

Cross-topic global statistics & economic data

Chinese scientific data repository with DOIs

Data on global development

Official Chinese statistics

Monoisotopic and average mass, natural isotope distributions, MF finder from m/z, peptide / oligonucleotide fragment tables, amino acid composition average m/z and polymer oligomer lists — all computed locally in the browser

Theoretical mass of every peptide from an in-silico protein digest, with cleavage rules identical to ExPASy PeptideMass — 25 enzymes/reagents, cysteine alkylation, methionine oxidation, 0-5 missed cleavages, seven ion forms up to 5+ charge, monoisotopic / average masses, plus intact protein mass and isoelectric point (Bjellqvist), computed locally in the browser

Theoretical a/b/c and x/y/z fragment ion m/z tables at 1+ to 3+ with -NH3 / -H2O secondary ions — global modification rules applied once and multi-line batch input with a table per peptide, computed locally in the browser

Batch GRAVY (grand average of hydropathy) for multi-FASTA protein sequences on the Kyte-Doolittle scale — gzip file import, ignore chars, custom separator and decimal sign, computed locally in the browser

Monoisotopic / average mass and elemental composition of glycans and glycopeptides: underivatized, permethylated, 2-AA and 2-AB labelled forms plus 52 ESI adduct m/z values — modelled on the NIST Glyco Mass Calculator, computed locally in the browser

Polyacrylamide gel recipes for SDS-PAGE: enter the gel count and the separating / stacking percentages and get ddH2O, 30% or 40% acrylamide stock, 1.5 M Tris pH 8.8 and 0.5 M Tris pH 6.8, 10% SDS, 10% APS and TEMED in ml and µl, plus a copyable six-step protocol — modelled on cytographica.com/lab/acryl2.html, computed locally in the browser

Melting temperature of PCR primers and oligos by the nearest-neighbor method (SantaLucia 1998 unified parameters) with adjustable Na+ salt and primer concentration, plus GC%, GC clamp, Wallace/Wetmur references, 3'-end self-complementarity, hairpin and homopolymer design warnings — batch paste, computed locally in the browser

Three bench calculations on one page: solve any blank of C1V1=C2V2 dilutions, interconvert molar mass / concentration / mass / volume (m=C·V·MW), and get buffer pH recipes from Henderson-Hasselbalch - mix two equimolar stocks or weigh the solid and titrate with HCl/NaOH - with pKa and MW data for 18 common buffers, computed locally in the browser

Medical formula calculator library

NIH database of chemical substances & bioactivity

Open-source reference manager

AI literature review assistant

AI search for scientific consensus

Literature connection graphs

Literature tracking & citation graphs

Social network for researchers

Graduate & research exchange community

Enter authors, title, container, year, volume/issue/pages and DOI to instantly format a reference in seven styles (APA, MLA, Chicago, Harvard, IEEE, Vancouver, GB/T 7714) for eight source types (journal, book, web, conference, thesis, chapter, report, newspaper) - look up metadata by DOI/ISBN, get in-text citations, build an auto-sorting multi-reference list and batch-export BibTeX/RIS, or paste an existing reference to detect its style; mostly in your browser

Open-source environment for statistical computing and graphics — the lingua franca of academic statistics

R's official package repository: 20,000+ extensions for statistics and plotting

Home of the RStudio IDE and Quarto — the working environment for data analysis

R package ecosystem for bioinformatics: differential expression, enrichment and omics visualisation

Hundreds of R plotting examples with full code, sorted by chart type and purpose

The commercial standard for biomedical statistics and figures, with a point-and-click workflow

Data analysis and publication-quality scientific graphing, widely used in the physical sciences

Free and open-source statistics with an SPSS-style interface and built-in Bayesian analysis

Free and open-source statistics — migrating from SPSS costs almost no learning time

Statistics Q&A community; search here before asking about methodology

A teaching site that explains statistical concepts plainly — reach for it when p-values or test choice confuse you

Tutorial library for statistics and programming, organised by what you are trying to do

A complete reference for implementing statistical methods in Excel

Engineering and numerical computing platform with statistics and graphics toolboxes

Statistical software common in econometrics and the social sciences

The cornerstone Python library for tabular and time-series data analysis

Statistical graphics on top of matplotlib: distribution and regression plots in a few lines

Python's most general plotting library — it can draw almost anything

Colour-vision-deficiency simulation plus a figure palette check: upload a chart, heatmap or micrograph and see at once how it looks with protanopia, deuteranopia, tritanopia, total colour blindness and in black-and-white print, with severity adjustable from 0 to 100%. The palette is extracted automatically and every pair is compared with CIEDE2000 to flag colours that blur together, alongside a ΔE00 matrix, a greyscale distinguishability check and a safety audit of 34 common colourmaps (viridis / cividis / turbo / jet / rainbow / RdYlGn and more). Based on the Machado 2009 physiological model; computed locally in the browser, nothing is uploaded

中文简繁互转，基于维基百科词表，支持台湾/香港/大陆用词

Compare two texts side by side; accept or reject each change and export the merged result

PDF合并/拆分/整理/转换/水印/……等全功能，纯本地不上传

TinyPNG 式免费图片压缩：PNG 有损量化（≤256 色 + 抖动，颜色数不超上限时无损）、JPEG 重编码、WebP 转换，压缩对比与批量打包下载，浏览器本地处理不上传。

PNG/JPEG/WEBP/BMP/GIF/SVG/AVIF/TIFF/ICO/APNG 十种格式互转：批量多选或拖入文件夹（最多 50 张，结果打包 ZIP）、质量滑块控体积、透明区域可选填充色、旋转翻转与缩放、灰度/黑白/怀旧色彩模式与文字水印，全部在浏览器本地转换不上传。

GIF 动图压缩优化：逐帧解码后做帧间差分（每帧只存变化的那一片）、相近色合并、降色与误差扩散、等比缩放与抽帧调速，实时对比优化前后体积与节省比例，支持批量与 ZIP 打包，透明与循环保留，全程浏览器本地处理不上传。

浏览器里的文字转语音：最多 2500 字符，按浏览器与系统提供的发音人朗读多语言文本，语速音调音量可调，长文自动分段，可暂停/继续/停止，本地合成不上传

浏览器里的语音听写：点「开始听写」对着麦克风说话，文字实时出现并落在光标处，说「句号」「逗号」「换行」即插入标点，连续听写、自动保存、可导出 txt/Word，识别在本地浏览器完成不上传

查 IP 归属地/运营商/ASN，支持 IPv6，打开即显示本机 IP

AI background removal in one click

Open-source image compression by Google: compare WebP, AVIF and MozJPEG side by side with a live quality slider — drag a photo in, everything runs locally

Universal file format conversion

QR code generator & decoder

Disposable inbox for verification codes

Cross-platform cloud storage & file sync

15 GB of free cloud storage

Microsoft cloud drive, tight Office integration

China's largest personal cloud drive

Smart cloud drive with generous free storage

Xiaomi's open model platform — free API credits on sign-up

Huawei Cloud AI coding assistant — free tokens on sign-up

ByteDance's AI coding IDE — tokens via the event page

AI work assistant — free credits with an invite link

OpenAI's flagship chat assistant

Google's multimodal AI assistant

China's open-weight frontier model

Anthropic's long-context AI assistant

Moonshot AI long-context assistant

xAI assistant wired into X data

Top-tier AI image generation

AI song generation in one click

AI decks, docs & presentations

Ad-free academic AI search

ByteDance AI image & video creation

MiniMax video generation

AI video generation and editing: text-to-video, image-to-video and camera moves, a film-grade post-production toolkit

AI avatar videos: multilingual voice-over with lip sync, for batch-producing course and training videos

The world's largest model community

Alibaba open-model community

Aggregate API gateway for many models

Run large models locally

NIH-funded project & grant search

Unified US federal grants portal

Global research funding opportunity search

US National Science Foundation

EU Horizon Europe funding & tenders

EU-funded research results database

Wellcome Trust biomedical funding

Apply to & track National Natural Science Fund grants

Funding policies & programme guidelines

National key R&D programme applications

CNSS fund applications & reviews

Online courses from world universities

Course platform founded by MIT & Harvard

Global skills course marketplace

Free MIT course materials

Free general education for everyone

Open chemistry textbooks & course materials

University lectures with Chinese subtitles

National-level courses from top universities

MOOC platform started at Tsinghua

Credit courses for Chinese universities

Official postgraduate entrance exam portal

Postgraduate exam news & experience forum

Chinese corpus search system from Peking University

Word frequency curves across five centuries of books

High-quality rare book library

Full-text reading & search of Chinese classics

High-resolution classical paintings & calligraphy

Merck's reagent & chemical supplier

Instruments, reagents & consumables

Chinese research reagent supplier

Reagent & instrument marketplace

Research procurement platform

Chinese chemical reagent brand

Leading Chinese bio-assay reagent brand

Histology & lab testing services

siRNA reagents & gene synthesis

Peptide synthesis & gene services

Recombinant proteins & antibodies

Molecular biology enzymes & restriction enzymes

Glycobiology & labelling reagents

Chemical reagents & materials supplier

Antibody & life-science reagent distributor

Tokyo Chemical Industry reagents

Chemical property & supplier directory

Alibaba's mega marketplace

Direct retail with fast delivery

Social group-buying at low prices

Appliance & electronics retailer

Second-hand marketplace

Streetwear commerce, authenticated first

Online design templates

Collaborative interface design

Chinese online UI design tool

Commercial templates & background removal

High-resolution free photography

Free HD photos & video

Free stock media for commercial use

High-quality wallpapers

Unicode 16.0 全部 3781 个表情符号，码点 / UTF-8 / HTML 实体一览，搜索复制

文字转 ASCII 横幅、图片转 ASCII 字符画，三档字符集与 20-200 字符宽度，纯本地

Alibaba's vector icon library

The world's largest free font library

Classic icon font library

ByteDance open-source icon set

Free commercial-use Chinese fonts

The world's largest code hosting platform

Integrated DevOps platform

Interactive coding tutorials

Chinese programming tutorials

API docs for many languages in one place

Animated data structures & algorithms

Linux command quick reference

Global Q&A for programmers

High-quality Chinese dev community

Community for creators & developers

Chinese developer Q&A

Open-source news for Chinese developers

Curated reviews of free Windows, Android and macOS utilities — a reliable place to hunt for lab and research software

在线 URL 编码/解码器：标准模式 encodeURIComponent（RFC 3986）与表单模式（x-www-form-urlencoded，空格编码为 +）实时互转，中文字符/空格/&/#/? 自动转义与还原，附字符与 UTF-8 字节统计、编码对照表和本地历史记录，纯前端计算不上传

Online regex tester like RegExr: real-time highlighted matches, group details, $1 replacement preview, syntax cheat sheet and step-by-step explanation

在线 Cron 表达式生成器：预设每分钟/每小时/每天/每周/每月，自定义支持 *、步长 */n、范围 a-b 与列表写法，实时校验并预览本地时区最近 10 次执行时间，一键复制，纯前端计算

JSON formatter & validator

Browser compatibility tables

Hand-drawn style whiteboard

Badges for open-source projects

Site-wide traffic & conversion stats

Indexing status & search traffic

Centralize analytics & marketing tags

Bing indexing & site map tools

Yandex webmaster tools

Submit pages & verify ownership

Content monetization ad network

Ad inventory & revenue management

Search & display advertising

ByteDance ad platform (Douyin)

Load speed & waterfall analysis

HTTP security-header audit

SEO weight & keyword analysis

抓取并解析任意站点 robots.txt：分组指令、路径放行判定、语法与 SEO 体检

The world's biggest community forum

High-quality Chinese Q&A community

China's social news hub

TikTok China creator platform

Xiaohongshu creator platform

Article publishing console

Uploads & channel management

Zhihu creator center

WeChat article layout editor

WeChat graphic layout design

New-media data platform

Sign in to manage cloud servers & object storage

Cloud servers & domains

CDN, DNS & security

浏览器实测下载 / 上传 / 延迟 / 抖动，仪表实时读数，流量走 Cloudflare 公共测速节点

The world's largest video platform

China's top video site: docs, courses & anime

Global streaming giant

Tencent's streaming platform

Dramas, films & variety shows

Alibaba's video platform

Free official CCTV programmes

The world's film & TV database

Open movie & TV metadata database

Ratings, reviews & watchlists

Global music streaming

Apple music streaming

Long-standing Chinese music platform

Music community with comments

Audiobooks, podcasts & audio platform

Audio dramas & voice content

Online radio & podcasts

Listen to live radio around the world

Ambient noise mixer for focus

Official end-of-day turnover & trading stats

Official quotes, filings & monthly statistics

Statutory disclosure site for listed companies

Top-trader lists, northbound flow & lockup expiries

Monetary policy, financial statistics & rate notices

Company registry, legal & equity information

Real-time wires for A-shares & global markets

Global markets & macro news, in Chinese

24/7 macro newswire & economic calendar

Business & policy coverage from the TV network

Investigations & macro business news (paywalled)

HK & US equities with a reader community

Finance channel of the Sina portal

Quotes software & company profiles

Ask about the market or screen stocks in plain language

Quotes, data centre & brokerage portal

Mutual-fund NAVs, holdings & screener

Investor community, portfolios & stock discussion

Per-stock message boards, a read on sentiment

Short-term theme & session-replay community

Community for HK & US stock investors

公历农历对照月历，含二十四节气、节日休班、黄历宜忌冲煞与十二时辰吉凶，公农历互转

任选两城市实时对照时刻与时差，自动夏令时，跨时区换算，附世界城市时钟墙

在线身份证号查询：18 位号码本地解析户籍所在地、出生日期、性别、周岁、星座、生肖，MOD 11-2 校验位复核，证件卡分段图解，号码不落盘不外传

顶部填一次出生日期与时辰，一屏同时给出：生日解析（农历/节气/生命数字/年柱纳音）、立春换年与节气定月的四柱排盘（藏干/纳音/十神/五行分布）、属相反查年份、本命年与生肖配对，结果随输入实时更新，纯本地计算

在线贷款计算器四合一：贷款（等额本息/等额本金月供与逐月明细、可导出 CSV）、房贷（商业/公积金/组合贷款）、房贷提前还款（一次性结清、缩短年限、减少月供的节省利息）、分期手续费（每期手续费/合计/真实年化 IRR），纯本地计算

车险保费在线估算：交强险、第三者责任险、车辆损失险、车上人员责任险、车身划痕险、医保外用药责任险与车船税，按现行交强险浮动费率（A–E 五类地区）与行业基准费率即时计价，纯本地计算不上传

依据《诉讼费用交纳办法》分档速算案件受理费、执行费、保全费、支付令等，附收费标准速查表

个人所得税按累计预扣预缴算本期与全年税额、税后到手与平均税率，附七级年度税率表与专项附加扣除；五险一金按养老/医疗/失业/工伤/公积金的个人与单位比例算分项明细、扣后应发与单位总成本，纯本地计算

在线单位换算器：长度/面积/体积/质量/温度/速度/压力/功率/能量/存储（GB 与 GiB）/油耗/角度/进制，14 类 212 个单位，输入即换算

Postdoc job board run by Science

Academic jobs & career advice from Nature

UK university & research job board

EU researcher jobs & mobility support

European academic & research vacancies

Chinese postdoc portal: enrollment, funding

Official degree & student record verification

Direct-chat job platform

Comprehensive job board

Veteran Chinese job site

Official railway ticketing

Flights, hotels & travel

Travel metasearch & booking

Maps, navigation & live traffic